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Documentation is currently for moon v2 and latest proto. Documentation for moon v1 has been frozen and can be found here.

mcp

v0.54.0

The proto mcp command starts a Model Context Protocol server over stdio, allowing AI agents and other MCP-compatible clients to interact with proto's toolchain, configuration, and environment.

$ proto mcp

The server is intended to be launched by an MCP client, not invoked directly. Configure your client (Claude Code, Cursor, etc) to spawn proto mcp as the server command.

Inspecting the server​

To see what the server exposes without starting an actual session, pass --info. This will print the server metadata and a list of all available tools and resources.

$ proto mcp --info

Tools​

The server exposes the following tools to MCP clients:

  • install_tool - Install a tool with a specified version.
  • uninstall_tool - Uninstall a tool with a specified version.
  • list_tool_versions - List available and installed versions for a tool.
  • get_config - Get the current proto configuration.

Resources​

The server also exposes the following resources:

  • proto://config - Configuration loaded for the current working directory.
  • proto://env - The current proto environment, store paths, variables, and more.
  • proto://tools - List of installed tools and their versions.

Options​

  • --info - Display server information and list available tools and resources, then exit.